Potassium is not a vitamin, but a vital mineral. It is important for the acid-base balance, the transmission of nerve impulses, heart function, the regulation of blood pressure and muscle contractions.
A disturbance of the salt balance in combination with a potassium deficiency can trigger atrial fibrillation and other cardiac arrhythmias. To correct this quickly, potassium and magnesium should be supplied. The easiest way to do this is by supplementing food supplements.
The German Nutrition Society (DGE) recommends a daily intake of about 4000 milligrams of potassium for an adult. Children up to the age of 10 need half the amount of an adult, i.e. the requirement is approx. 2000 milligrams. For breastfeeding women, the recommended amount of potassium is about 4400 milligrams, since they have to provide for their child through their mother's milk.